/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:27:56,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:27:56,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:27:56,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:27:56,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:27:56,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:27:56,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:27:56,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:27:56,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:27:56,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:27:56,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:27:56,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:27:56,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:27:56,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:27:56,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:27:56,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:27:56,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:27:56,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:27:56,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:27:56,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:27:56,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:27:56,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:27:56,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:27:56,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:27:56,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:27:56,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:27:56,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:27:56,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:27:56,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 01:27:56,871 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:27:56,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:27:56,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:27:56,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:27:56,873 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:27:56,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:27:56,873 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:27:56,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:27:56,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:27:56,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:27:56,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:27:56,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:27:56,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:27:56,875 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:27:56,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:27:56,875 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:27:56,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:27:56,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:27:56,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:27:56,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:27:56,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:27:56,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:27:56,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:27:56,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:27:56,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:27:56,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:27:56,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:27:56,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:27:56,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:27:56,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:27:57,157 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:27:57,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:27:57,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:27:57,185 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:27:57,187 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:27:57,189 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-07-20 01:27:57,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63ec01bb0/71e09c4a4fb64606abfe14b09ffacd94/FLAG1e89ed59a [2020-07-20 01:27:57,763 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:27:57,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c [2020-07-20 01:27:57,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63ec01bb0/71e09c4a4fb64606abfe14b09ffacd94/FLAG1e89ed59a [2020-07-20 01:27:58,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63ec01bb0/71e09c4a4fb64606abfe14b09ffacd94 [2020-07-20 01:27:58,103 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:27:58,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:27:58,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:27:58,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:27:58,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:27:58,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:27:58" (1/1) ... [2020-07-20 01:27:58,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@631b98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:58, skipping insertion in model container [2020-07-20 01:27:58,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:27:58" (1/1) ... [2020-07-20 01:27:58,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:27:58,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:27:58,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:27:58,336 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:27:58,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:27:58,369 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:27:58,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:58 WrapperNode [2020-07-20 01:27:58,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:27:58,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:27:58,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:27:58,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:27:58,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:58" (1/1) ... [2020-07-20 01:27:58,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:58" (1/1) ... [2020-07-20 01:27:58,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:58" (1/1) ... [2020-07-20 01:27:58,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:58" (1/1) ... [2020-07-20 01:27:58,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:58" (1/1) ... [2020-07-20 01:27:58,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:58" (1/1) ... [2020-07-20 01:27:58,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:58" (1/1) ... [2020-07-20 01:27:58,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:27:58,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:27:58,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:27:58,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:27:58,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:27:58,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:27:58,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:27:58,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:27:58,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:27:58,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:27:58,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:27:58,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:27:58,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:27:58,822 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:27:58,822 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 01:27:58,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:27:58 BoogieIcfgContainer [2020-07-20 01:27:58,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:27:58,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:27:58,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:27:58,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:27:58,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:27:58" (1/3) ... [2020-07-20 01:27:58,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c040112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:27:58, skipping insertion in model container [2020-07-20 01:27:58,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:58" (2/3) ... [2020-07-20 01:27:58,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c040112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:27:58, skipping insertion in model container [2020-07-20 01:27:58,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:27:58" (3/3) ... [2020-07-20 01:27:58,836 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-07-20 01:27:58,847 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:27:58,857 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:27:58,876 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:27:58,909 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:27:58,909 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:27:58,909 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:27:58,909 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:27:58,909 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:27:58,910 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:27:58,910 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:27:58,910 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:27:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 01:27:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 01:27:58,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:27:58,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:27:58,960 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:27:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:27:58,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-07-20 01:27:58,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:27:58,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109246904] [2020-07-20 01:27:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:27:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:27:59,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109246904] [2020-07-20 01:27:59,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:27:59,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:27:59,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525520750] [2020-07-20 01:27:59,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:27:59,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:27:59,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:27:59,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,231 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-20 01:27:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:27:59,283 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-07-20 01:27:59,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:27:59,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 01:27:59,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:27:59,299 INFO L225 Difference]: With dead ends: 69 [2020-07-20 01:27:59,299 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 01:27:59,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 01:27:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-07-20 01:27:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 01:27:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-07-20 01:27:59,354 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-07-20 01:27:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:27:59,354 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-07-20 01:27:59,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:27:59,355 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-07-20 01:27:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 01:27:59,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:27:59,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:27:59,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:27:59,357 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:27:59,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:27:59,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-07-20 01:27:59,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:27:59,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415759557] [2020-07-20 01:27:59,359 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:27:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:27:59,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415759557] [2020-07-20 01:27:59,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:27:59,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:27:59,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947663389] [2020-07-20 01:27:59,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:27:59,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:27:59,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:27:59,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,441 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-07-20 01:27:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:27:59,511 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-07-20 01:27:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:27:59,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 01:27:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:27:59,515 INFO L225 Difference]: With dead ends: 87 [2020-07-20 01:27:59,516 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 01:27:59,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 01:27:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-20 01:27:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 01:27:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-07-20 01:27:59,545 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-07-20 01:27:59,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:27:59,545 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-07-20 01:27:59,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:27:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-07-20 01:27:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 01:27:59,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:27:59,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:27:59,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:27:59,553 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:27:59,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:27:59,554 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-07-20 01:27:59,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:27:59,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264378871] [2020-07-20 01:27:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:27:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:27:59,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264378871] [2020-07-20 01:27:59,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:27:59,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:27:59,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47141468] [2020-07-20 01:27:59,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:27:59,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:27:59,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:27:59,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,622 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-07-20 01:27:59,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:27:59,645 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-07-20 01:27:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:27:59,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 01:27:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:27:59,647 INFO L225 Difference]: With dead ends: 81 [2020-07-20 01:27:59,648 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 01:27:59,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 01:27:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-07-20 01:27:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 01:27:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-07-20 01:27:59,658 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-07-20 01:27:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:27:59,659 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-07-20 01:27:59,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:27:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-07-20 01:27:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 01:27:59,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:27:59,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:27:59,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 01:27:59,662 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:27:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:27:59,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-07-20 01:27:59,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:27:59,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249605730] [2020-07-20 01:27:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:27:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:27:59,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249605730] [2020-07-20 01:27:59,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:27:59,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:27:59,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56328194] [2020-07-20 01:27:59,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:27:59,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:27:59,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:27:59,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,706 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-07-20 01:27:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:27:59,727 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-07-20 01:27:59,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:27:59,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 01:27:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:27:59,730 INFO L225 Difference]: With dead ends: 100 [2020-07-20 01:27:59,730 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 01:27:59,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 01:27:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-07-20 01:27:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 01:27:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-07-20 01:27:59,743 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-07-20 01:27:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:27:59,745 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-07-20 01:27:59,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:27:59,746 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-07-20 01:27:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 01:27:59,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:27:59,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:27:59,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 01:27:59,748 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:27:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:27:59,748 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-07-20 01:27:59,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:27:59,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587923458] [2020-07-20 01:27:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:27:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:27:59,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587923458] [2020-07-20 01:27:59,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:27:59,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:27:59,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119011902] [2020-07-20 01:27:59,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:27:59,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:27:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:27:59,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,828 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-07-20 01:27:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:27:59,860 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-07-20 01:27:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:27:59,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 01:27:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:27:59,863 INFO L225 Difference]: With dead ends: 164 [2020-07-20 01:27:59,863 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 01:27:59,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 01:27:59,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-07-20 01:27:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 01:27:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-07-20 01:27:59,889 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-07-20 01:27:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:27:59,890 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-07-20 01:27:59,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:27:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-07-20 01:27:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 01:27:59,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:27:59,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:27:59,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 01:27:59,893 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:27:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:27:59,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-07-20 01:27:59,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:27:59,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501945510] [2020-07-20 01:27:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:27:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:27:59,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501945510] [2020-07-20 01:27:59,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:27:59,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:27:59,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087740145] [2020-07-20 01:27:59,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:27:59,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:27:59,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:27:59,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,969 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-07-20 01:27:59,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:27:59,992 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-07-20 01:27:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:27:59,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 01:27:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:27:59,994 INFO L225 Difference]: With dead ends: 147 [2020-07-20 01:27:59,994 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 01:27:59,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:27:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 01:28:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-07-20 01:28:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 01:28:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-07-20 01:28:00,005 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-07-20 01:28:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,006 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-07-20 01:28:00,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-07-20 01:28:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 01:28:00,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 01:28:00,008 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-07-20 01:28:00,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707614422] [2020-07-20 01:28:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707614422] [2020-07-20 01:28:00,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488063253] [2020-07-20 01:28:00,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,043 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-07-20 01:28:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:00,062 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-07-20 01:28:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:00,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 01:28:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:00,064 INFO L225 Difference]: With dead ends: 180 [2020-07-20 01:28:00,065 INFO L226 Difference]: Without dead ends: 178 [2020-07-20 01:28:00,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-20 01:28:00,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-07-20 01:28:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 01:28:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-07-20 01:28:00,077 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-07-20 01:28:00,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,078 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-07-20 01:28:00,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-07-20 01:28:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 01:28:00,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 01:28:00,080 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-07-20 01:28:00,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057508514] [2020-07-20 01:28:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057508514] [2020-07-20 01:28:00,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991594427] [2020-07-20 01:28:00,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,120 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-07-20 01:28:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:00,142 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-07-20 01:28:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:00,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 01:28:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:00,144 INFO L225 Difference]: With dead ends: 312 [2020-07-20 01:28:00,145 INFO L226 Difference]: Without dead ends: 186 [2020-07-20 01:28:00,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-07-20 01:28:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-07-20 01:28:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-20 01:28:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-07-20 01:28:00,157 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-07-20 01:28:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,157 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-07-20 01:28:00,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-07-20 01:28:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 01:28:00,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 01:28:00,160 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-07-20 01:28:00,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89704663] [2020-07-20 01:28:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89704663] [2020-07-20 01:28:00,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073948122] [2020-07-20 01:28:00,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,186 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-07-20 01:28:00,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:00,203 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-07-20 01:28:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:00,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 01:28:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:00,205 INFO L225 Difference]: With dead ends: 276 [2020-07-20 01:28:00,205 INFO L226 Difference]: Without dead ends: 190 [2020-07-20 01:28:00,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-20 01:28:00,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-07-20 01:28:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-20 01:28:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-07-20 01:28:00,218 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-07-20 01:28:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,218 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-07-20 01:28:00,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,219 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-07-20 01:28:00,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 01:28:00,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 01:28:00,222 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-07-20 01:28:00,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456538149] [2020-07-20 01:28:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456538149] [2020-07-20 01:28:00,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619836636] [2020-07-20 01:28:00,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,290 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-07-20 01:28:00,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:00,317 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-07-20 01:28:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:00,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 01:28:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:00,324 INFO L225 Difference]: With dead ends: 332 [2020-07-20 01:28:00,324 INFO L226 Difference]: Without dead ends: 330 [2020-07-20 01:28:00,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-07-20 01:28:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-07-20 01:28:00,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-20 01:28:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-07-20 01:28:00,338 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-07-20 01:28:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,339 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-07-20 01:28:00,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-07-20 01:28:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 01:28:00,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 01:28:00,345 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-07-20 01:28:00,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113998915] [2020-07-20 01:28:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113998915] [2020-07-20 01:28:00,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292997325] [2020-07-20 01:28:00,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,384 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-07-20 01:28:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:00,425 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-07-20 01:28:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:00,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 01:28:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:00,428 INFO L225 Difference]: With dead ends: 604 [2020-07-20 01:28:00,428 INFO L226 Difference]: Without dead ends: 354 [2020-07-20 01:28:00,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-07-20 01:28:00,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-07-20 01:28:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-20 01:28:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-07-20 01:28:00,451 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-07-20 01:28:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,452 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-07-20 01:28:00,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-07-20 01:28:00,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 01:28:00,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 01:28:00,455 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-07-20 01:28:00,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721923475] [2020-07-20 01:28:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721923475] [2020-07-20 01:28:00,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535352847] [2020-07-20 01:28:00,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,477 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-07-20 01:28:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:00,495 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-07-20 01:28:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:00,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 01:28:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:00,498 INFO L225 Difference]: With dead ends: 528 [2020-07-20 01:28:00,498 INFO L226 Difference]: Without dead ends: 362 [2020-07-20 01:28:00,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-07-20 01:28:00,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-07-20 01:28:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-07-20 01:28:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-07-20 01:28:00,510 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-07-20 01:28:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,511 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-07-20 01:28:00,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-07-20 01:28:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 01:28:00,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 01:28:00,513 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-07-20 01:28:00,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761902] [2020-07-20 01:28:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761902] [2020-07-20 01:28:00,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748791315] [2020-07-20 01:28:00,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,535 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-07-20 01:28:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:00,555 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-07-20 01:28:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:00,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 01:28:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:00,560 INFO L225 Difference]: With dead ends: 620 [2020-07-20 01:28:00,560 INFO L226 Difference]: Without dead ends: 618 [2020-07-20 01:28:00,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-07-20 01:28:00,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-07-20 01:28:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-07-20 01:28:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-07-20 01:28:00,577 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-07-20 01:28:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,577 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-07-20 01:28:00,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-07-20 01:28:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 01:28:00,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 01:28:00,579 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-07-20 01:28:00,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583935993] [2020-07-20 01:28:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583935993] [2020-07-20 01:28:00,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071488768] [2020-07-20 01:28:00,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,603 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-07-20 01:28:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:00,629 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-07-20 01:28:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:00,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 01:28:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:00,633 INFO L225 Difference]: With dead ends: 1180 [2020-07-20 01:28:00,633 INFO L226 Difference]: Without dead ends: 682 [2020-07-20 01:28:00,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-07-20 01:28:00,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-07-20 01:28:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-07-20 01:28:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-07-20 01:28:00,653 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-07-20 01:28:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,654 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-07-20 01:28:00,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-07-20 01:28:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:28:00,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 01:28:00,656 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,656 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-07-20 01:28:00,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108898781] [2020-07-20 01:28:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108898781] [2020-07-20 01:28:00,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657149584] [2020-07-20 01:28:00,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,677 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-07-20 01:28:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:00,701 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-07-20 01:28:00,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:00,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 01:28:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:00,705 INFO L225 Difference]: With dead ends: 1020 [2020-07-20 01:28:00,705 INFO L226 Difference]: Without dead ends: 698 [2020-07-20 01:28:00,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-07-20 01:28:00,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-07-20 01:28:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-07-20 01:28:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-07-20 01:28:00,730 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-07-20 01:28:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,731 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-07-20 01:28:00,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-07-20 01:28:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:28:00,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 01:28:00,733 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,734 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-07-20 01:28:00,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251319822] [2020-07-20 01:28:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251319822] [2020-07-20 01:28:00,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044591163] [2020-07-20 01:28:00,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,758 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-07-20 01:28:00,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:00,790 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-07-20 01:28:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:00,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 01:28:00,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:00,797 INFO L225 Difference]: With dead ends: 1164 [2020-07-20 01:28:00,797 INFO L226 Difference]: Without dead ends: 1162 [2020-07-20 01:28:00,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-07-20 01:28:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-07-20 01:28:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-07-20 01:28:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-07-20 01:28:00,834 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-07-20 01:28:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,834 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-07-20 01:28:00,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-07-20 01:28:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:28:00,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 01:28:00,837 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,838 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-07-20 01:28:00,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391031015] [2020-07-20 01:28:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391031015] [2020-07-20 01:28:00,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076365747] [2020-07-20 01:28:00,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,878 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-07-20 01:28:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:00,915 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-07-20 01:28:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:00,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 01:28:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:00,922 INFO L225 Difference]: With dead ends: 2316 [2020-07-20 01:28:00,923 INFO L226 Difference]: Without dead ends: 1322 [2020-07-20 01:28:00,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-07-20 01:28:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-07-20 01:28:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-07-20 01:28:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-07-20 01:28:00,966 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-07-20 01:28:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:00,966 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-07-20 01:28:00,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:00,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-07-20 01:28:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 01:28:00,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:00,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:00,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 01:28:00,970 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:00,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:00,970 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-07-20 01:28:00,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:00,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786867453] [2020-07-20 01:28:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:00,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786867453] [2020-07-20 01:28:00,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:00,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:00,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263679318] [2020-07-20 01:28:00,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:00,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:00,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:00,990 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-07-20 01:28:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:01,025 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-07-20 01:28:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:01,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 01:28:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:01,032 INFO L225 Difference]: With dead ends: 1980 [2020-07-20 01:28:01,033 INFO L226 Difference]: Without dead ends: 1354 [2020-07-20 01:28:01,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-07-20 01:28:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-07-20 01:28:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-07-20 01:28:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-07-20 01:28:01,075 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-07-20 01:28:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:01,075 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-07-20 01:28:01,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-07-20 01:28:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 01:28:01,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:01,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:01,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-20 01:28:01,078 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-07-20 01:28:01,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:01,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914892260] [2020-07-20 01:28:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:01,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914892260] [2020-07-20 01:28:01,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:01,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:01,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997577418] [2020-07-20 01:28:01,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:01,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:01,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:01,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:01,100 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-07-20 01:28:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:01,145 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-07-20 01:28:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:01,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 01:28:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:01,155 INFO L225 Difference]: With dead ends: 2186 [2020-07-20 01:28:01,155 INFO L226 Difference]: Without dead ends: 2184 [2020-07-20 01:28:01,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-07-20 01:28:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-07-20 01:28:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-07-20 01:28:01,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-07-20 01:28:01,212 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-07-20 01:28:01,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:01,212 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-07-20 01:28:01,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:01,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-07-20 01:28:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 01:28:01,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:01,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:01,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-20 01:28:01,216 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-07-20 01:28:01,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:01,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415204921] [2020-07-20 01:28:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e94249c [2020-07-20 01:28:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:01,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415204921] [2020-07-20 01:28:01,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:01,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:28:01,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405239458] [2020-07-20 01:28:01,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:28:01,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:01,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:28:01,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:01,238 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-07-20 01:28:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:01,305 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-07-20 01:28:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:28:01,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 01:28:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:01,306 INFO L225 Difference]: With dead ends: 4552 [2020-07-20 01:28:01,306 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:28:01,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:28:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:28:01,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:28:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:28:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:28:01,315 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-07-20 01:28:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:01,315 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:28:01,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:28:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:28:01,316 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:28:01,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-20 01:28:01,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:28:01,348 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 01:28:01,348 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:28:01,349 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:28:01,349 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 01:28:01,349 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:28:01,349 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:28:01,349 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-07-20 01:28:01,349 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-07-20 01:28:01,349 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,350 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-07-20 01:28:01,350 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-07-20 01:28:01,350 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-07-20 01:28:01,350 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-07-20 01:28:01,350 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-07-20 01:28:01,350 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,350 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-07-20 01:28:01,350 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,351 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,351 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-07-20 01:28:01,351 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,351 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-20 01:28:01,351 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,351 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,351 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-07-20 01:28:01,351 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-07-20 01:28:01,352 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-07-20 01:28:01,352 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,352 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,352 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,352 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-07-20 01:28:01,352 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,352 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-07-20 01:28:01,352 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-07-20 01:28:01,353 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,353 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 01:28:01,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:28:01 BoogieIcfgContainer [2020-07-20 01:28:01,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:28:01,367 INFO L168 Benchmark]: Toolchain (without parser) took 3261.57 ms. Allocated memory was 138.4 MB in the beginning and 246.4 MB in the end (delta: 108.0 MB). Free memory was 103.1 MB in the beginning and 97.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 113.5 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:01,368 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 01:28:01,369 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.23 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 92.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:01,370 INFO L168 Benchmark]: Boogie Preprocessor took 108.99 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 92.6 MB in the beginning and 181.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:01,370 INFO L168 Benchmark]: RCFGBuilder took 346.77 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 164.0 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:01,371 INFO L168 Benchmark]: TraceAbstraction took 2537.06 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 163.3 MB in the beginning and 97.6 MB in the end (delta: 65.7 MB). Peak memory consumption was 110.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:01,374 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.23 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 92.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.99 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 92.6 MB in the beginning and 181.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 346.77 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 164.0 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2537.06 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 163.3 MB in the beginning and 97.6 MB in the end (delta: 65.7 MB). Peak memory consumption was 110.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...